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问题 填空题

油脂是一类重要的营养物质，油脂和淀粉的组成元素相同，都含有 _________ 、 _________ 、 _________ 三种元素，但是它们的 _________ 和 _________ 不同．油脂在人体内消化，在水和酶的作用下，氧化分解生成 _________ 分子和 _________ 分子，同时释放出热量．

答案

碳、氢、氧；组成；结构；脂肪酸；甘油

单项选择题

甲、乙、丙三人有多年的业务合作关系。5月5日，甲与乙交流时谈起甲最近的一批低价木材将照顾合作伙伴，以丙为出卖对象，就等丙答应了。5月6日，乙因另外一批生意向丙寄发合同书时顺便发出了甲出卖这批木材的合作意向。信件于5月7日到达。5月8日，丙致电报甲：将近日汇款，亲自上门提货。5月9日，甲收到电报后回电话称：不用着急付款，将送货上门。对此，下列表述正确的是：

A．甲的要约在5月7日生效
B．甲和丙间的合同在5月9日成立
C．5月8日丙致电甲属于要约
D．5月7日乙致丙的合同书所载合作意向性质属于要约邀请
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单项选择题

B


Waste can be seen everywhere in the school. Some students ask for more food than they can eat and others often forget to turn off the lights when they leave the classroom. They say they can afford these things. But I don’t agree with them.
Waste can bring a lot of problems. Although China is rich in some resources (资源), we are short of(缺乏) others, for example, fresh water(淡水). It is reported that we will have no coal (煤) or oil to use in 100 years. So if we go on wasting our resources, what can we use in the future and where can we move Think about it. I think we should say no to the students who waste things every day. Everybody should stop wasting as soon as possible.
In our everyday life, we can do many things to prevent waste from happening, for example, turn off the water taps (水龙头) when we finish washing, turn off the lights when we leave the classroom, try not to order more food than we need, and so on. Little by little, everything will he changed. Waste can be stopped one day, if we do our best.

Which is the best title of this passage ( )

A．Stop Wasting

B．School Life

C．Waste in the School

D．Rich Resources in China
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